Base Station Signal Transmission for BCH Demodulation Complexity
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Solution Overview
Problem
Mobile stations face increased complexity in receiving BCH information efficiently, which affects the quality of signal transmission, and there is a need to reduce this complexity while improving BCH receiving quality.
Innovation Solution
The method involves performing space-frequency block coding on broadcast channel symbols and applying precoding vectors to generate coded symbols for transmission through antennas, along with frequency switching transmission diversity for synchronization channel symbols, allowing for efficient transmission of antenna information and estimation of the number of antennas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the mobile station increases complexity to improve BCH receiving quality, then the receiving quality of BCH information is improved, but the device complexity increases
Solution Approach 1:
The patent segments antenna information transmission into two parts: partial information is transmitted through synchronization channel symbols, while other information is transmitted through broadcast channel symbols. This segmentation allows the mobile station to acquire antenna information more efficiently without increasing overall system complexity
Solution Approach 2:
The patent applies preliminary action by transmitting partial antenna information through synchronization channels before the mobile station needs to demodulate broadcast channels. This allows the mobile station to prepare for BCH demodulation in advance, improving receiving quality without requiring complex real-time processing
2Loss of information
If antenna information is transmitted through BCH only, then the information is complete, but the demodulation process becomes more complex
Solution Approach 1:
The patent divides antenna information into two categories: partial information transmitted via synchronization channel symbols and other information transmitted via broadcast channel symbols. This segmentation reduces the information burden on the BCH demodulation process while maintaining completeness
Solution Approach 2:
The patent introduces synchronization channel symbols as an intermediary to transmit partial antenna information. This intermediary structure simplifies the main BCH demodulation process by pre-providing necessary antenna information through a separate, simpler channel
Data Source
AI summary
A base station applies frequency switching transmission diversity and a precoding vector to a synchronization channel and applies a space-frequency block coding and a precoding vector to a broadcast channel. The base station controls the synchronization channel and the broadcast channel to be positioned adjacent each other and then generates and transmits a downlink frame. The base station includes partial information on the number of antennas in the synchronization channel, and other information thereon in the broadcast channel.